And what metrics would those be?
A Cinemascore (which is an exit poll of opening weekend audiences) of A-.
An IMDB user score of 7.4 from over 350,000 users.
A Rotten Tomatoes user score of 76% from over 400,000 users.
None of those are fully satisfactory measures, but they're the best we have and better than mere anecdotes. The user ratings are self-selecting, but at least they have a very large number of participants and are therefore a better measure than the far smaller self-selected hodgepodge of fandom message board posts.